<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <style>
        .content{
            border-top: 10px dashed;color: aqua;
            margin: 5px;
            height: 900px;
            width: 900px;
        }
        .box{
            border-left: 5px dotted;color: rgb(157, 223, 33);
            margin: 6px;
        }
        .h1{
            border-right: 7px solid;color: rgb(220, 214, 22);
            margin: 8px;
        }
        .parent{
            border-bottom: 15px double ;color: bisque;
            display: flex;
            align-items: center;
            justify-content: center;
        }   
    </style>
</head>
<body>
    <div class="content">
        <div class="box">
       <div class="h1">
        <div class="parent">
                <img src="./盒子模型.jpg">
        </div>
       </div>
        </div>
    </div>
</body>
</html>